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The significance of trial and error method, for controller tuning, is presented.

Quality function deployment (QFD) is a customer-oriented design tool with cross-functional team members reaching a consensus in developing a new or improved product to increase customer satisfaction. QFD starts with the house of quality (HOQ), which is a planning matrix translating the customer needs into measurable product technical requirements (PTRs). A robust evaluation method should consider the interrelationships among customer needs and PTRs while determining the importance levels of PTRs in the HOQ. This paper employs the analytic network process (ANP) to fulfill this requirement. Furthermore, the proposed analytic procedure should take into account the multi-objective nature of the problem, and thus, incorporate other goals such as cost, extendibility and manufacturability of PTRs. This paper presents a zero-one goal programming methodology that includes importance levels of PTRs derived using the ANP, cost budget, extendibility level and manufacturability level goals to determine the PTRs to be considered in designing the product. A numerical example is presented to illustrate the application of the decision approach. Keywords: Quality function deployment; House of quality; Dependence; Analytic network process; Zero-one goal programming

Timing analysis has come a long way from the old pencil-and-calculator days. Modern timing analyzers provide detailed timing information for your design. Now, you must decide whether a static or [...]

The education, experience, and the common sense of system analysts and designers tells them that user involvement when developing a new system is essential for success. So we invite the [...]

Test Strategies for Ensuring NDI System Quality Multi-level testing is a vital part of mil-spec computer manufacture for ensuring that the end product meets customer requirements. NOTE: This is part [...]

Goyal and Cardenas-Barron (2002), have presented a comparative study of solutions, in a note in the current issue, of Goyal's model [Oper. Res. Q. 28 (1977) 539] and Sarker and Khan's model [Comput. Ind. Engng 37 (1999) 711] on joint batch sizing problems. In this reply, we would like to point out that these two models are not directly comparable. The differences of these two models are discussed and the validity of Sarker and Khan's model is demonstrated.

There is usually lot of excitement when starting a new project. Most of the time, people are in a hurry to get on with things. As system developers, we need […]

Mil-Spec Computers Demand Rugged Design Design of a non-development item (NDI) multifunctional military computer is subject to an increased number of constraints over previously designed specific application hardware. The ability [...]

An expression is a sequence of operators and operands that specifies a computation. That computation might produce a resulting value and it might generate side effects. An assignment expression has […]

This is the first in a five-part series explaining some basic system types and sorting through the initial steps in building a trading system. We start with moving averages, a [...]

When you're building a machine-vision system, you must ensure that the lens you choose will properly capture an image that includes everything you want to inspect. Two simple formulas let […]

In this note we present a comparative study of solutions given by Sarker and Khan [Comput Ind Engng 37 (1999) 711]. Keywords: Optimal batch size; Production system; Periodic delivery policy

To clear system bottlenecks drive backplanes with ECL The CMOS and transistor-to-transistor logic (TTL) that drives the backplanes of computer and data-processing systems no longer need limit system speed. As […]

Cell Libraries Aid Systems Designers Despite recent predictions that a leveling off in many military programs can be expected during the latter half of the 1980s, command, control, communications and [...]

Hewlett-Packard is implementing a new design philosophy through use of the HP 64000 logic-development system. This system integrates all the hardware and software development phases in one system by linking them through a common database and operating system. The HP 64000 includes a transportable development station, a software state-analysis subsystem, and an asynchronous timing analyzer subsystem.

Design a DRAM controller from the top down The heart of any memory system that uses dynamic RAMs (DRAMs) as building blocks is the DRAM controller. The simplest way to [...]

Hybrid-IC techniques increase power in motor-drive circuits Thanks to the availability of 'smart-power' motor-drive ICs, you can control motors in a variety of applications. Problems arise, though, when an application [...]

An individual computer user can represent a wide group of users and help with the design of the computer system. Typically, at least two users should be responsible for the development stage, and an additional three to five users from the user group can provide consulting services. The users who are full-time can absorb constant, on-location exposure and may help analyze design specifications, focus on problems, and furnish design criteria to the systems designers. The users involved in the design of a system must provide complete and detailed information on the process that will be automated.